Gas-generating crucible-furnace.



E. H. SCHWARTZ. GAS GENERATING GRUUIBLE FURNACE.

' APPLIOATION TILED APR. 4, 1908.

Patented Jan. 19,1909.

2 SHEETS-SHEET l.

E; H. SCHWARTZ.

GAS GENERATING GRUGIBLE FURNACE.

APPLIOATION FILED APR. 4, 1908.

Patented Jan. 19

v 2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

EDWARD HQ SOHWARTZ OF CHICAGO, ILLINOIS, ASSIGNOR 'lO KROESOHELL "BROTHERS COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

GAS-GENERATING CRUCIBLE-FURNAOE.

Specification of Letters Patent.

Patented Jan. 19, 1909.

To allwhom 'it may concern:

Be it known that I, EDWARD H. SCHWARTZ,

' .a citizen of the United States'of America, and resident of Chicago, Illinois, have invented a certain new and useful Improvement in Gas-Generating Crucible-Furnaces, of which the following is a specification.

My invention relates to improvements in gas generating crucible furnaces and has or .its object the production of a device by the use of which the melting of metals is greatley facilitated.

A urther object is the production of a device by means of which air and steam may be freed from moisture before 'being forced into the combustion eha ber. A funtherobjectis the production of a device of simple constructiqn, the parts of which may be readily assembled and disassembled.

A further object is the production of a device in which practically perfect combustion may be eifected and a maximum of results obtained with a minimum of fuel.

A further object is the production of a device that is of durable character and one that is least liable to disarrangement of parts.

These and such other objects as may hereinafter appear are attained by the use of my device, an embodiment ofwhich is illustrated in the accompanying drawings, in

I which- Figure 1 represents a side elevation of my device. Fig. 2 is a top plan view, with the muflier hood out of position. Fig. 3 is a sectional view on line 33 ofFig. 1, looking in the direction indicated by arrows.

Fig. 4 is a sectional view on line 4--4 of Fig. 3, looking in the direction indicated by arrows. Fig. 5 is a bottom plan View of my device, showing the hinged beveled door,

'Fig. 6 is an enlarged detail of the lower door catch.

Like numerals of reference indicate like parts in the several figures of the drawing. Referring now by numerals to the accompan'ying drawings- 7 represents an outer terial.

casing or. shell preferably cylindrical in shape, having an inner lining S with a lining 9 inside of firebrick or some refractory ma- The upper portion of the lining 9 extends vertically while the lower portion slopes inwardly, forming'a conical fire-pot. The furnace is provided with a base plate 10,

i to which the shell or casin 7 is bolted as at 11. A lug or dam 12 exten s upwardly from the face of the plate 10 a short distance from the outer edge thereof, while a supplemental easing of metal 13 extends f1 om inside the casing 7 sloping downwardly outside the lining 8, and extending within the lug or dam 12. A space 14: is thus formed between the supplemental-casing 13 and the outer shell 7, the purpose of which will be explained later.

A beveled bottom cured to the plate 10 by means of hinges 16, as clearly shown in Fig. 5. -Theplate is also provided with abutments 17, thus insuring a tight joint between the edges of the door and the .Walls of the plate. This door is held in place by means of a catch 18 on the end of a lever 19. This catch 18 normall rests against the edge of the door 15, holting it securely in place. This door is conical in shape, and is preferably provided .at -its lower extremity with an open through theshells and supplemental casing, making open connection between the an outer shell 26 and an inner brick lining 27, and is hingingly secured to the lug 28-preferably cast on the top plate 22. A lever lug 29 is also cast on the door plate within which the lever 30 may be inserted, allowing the door to be easily raised. The door is prowhieh the products of combustion pass when the furnace is in operation. An air supply pipe 32 provided wlth a gate-valve 33 enters the lower part of the supplemental chamber 14 tangentially so as to force the air there from about the chamber. A steam pipe 34 enters the air pipe 32 at 35, and-is provided with a valve 36. This steam pipe terminates with a discharge opening 38, from which extends atube 39 preferably turned downspaee let and the inner chamber of the fur- A top plate .22 provided with a circular off the door 25. This door comprises an vided with a central opening 31 through.

door 15 is'hin'gingly se- A plurality of twyer openings 21 extend in a nozzle '37. The chamber 14 is provided a ;from the compartment 14 or. the admission of atmospheric air therein. A muiiler hood 43, of a substantially spherlcal shape, is removably located just above the opening 31. A pipe 44 connects the top of the mufiler hood with a discharge pipe 4:).

This discharge pipe is preferably provided with running Water, as shown at 46. This mufiler and pipe 44 is swingingly connected 15 with the top or fine of the pipe.45, as shown Referring to the operation of my device,

- the kindlings and coal are placed within the bottom part of the combustion chamber,

shown at 48,and a crucible 49 placed within the combustion chamber 50 and seated on top or pressed a little within the body of the coals'48. The cover or door at the top is then closed, and the fire started in the combustion chamber. As soon as theiire is ,well

under way, air-or air and steamis introduced through the pipe 82 into the supplemental chamber 14. This current is'forced 'in, ,tangentially, and through action of con- 30. trifugal force is thrown against the inside of the outer casing, through which operation all of the moisture within the air or steam is "caused to collect at the bottom of the chamber between the dam 12 and the casing, from which it is drawn off through the discharge pipe 39. The mixture of air and dry steam is then forced through the twyer opening through the twyers into the lower portion ofthe combustible material, -and upwardly 40 therethrough, thus accelerating the combustion and forming practically a gas generating machine. It is evident that if desired,

the introduction of steam may be done away with and only air pressure used, which may be obtained from a fan or blower in any well known way. 1 find, however, that by the introduction of steam the generation of gas is accelerated. The amount of pressure of the gas and air introduced can be regulated by means of the valves shown. As the fuel is partially consumed, it settles down to a slight degree, the crucible fitting closely within the center of the material. The lower portion of the combustion chambcr or practically the fire-pct-being conical in shape serves to cause the fuel to pack more closely and prevent any tipping or movement of the.

cruclble within the combustion chamber. By the use of this form of furnace, an intense heat is produced, and. by-exercising care in cible ready for removal. In the event that the crucible breaks, the molten material will pass down through the coals and escape through the opening '20.

The lining of the furnace is formed in two layers, one practically continuous layer 8 preferably of fire clay or brick, with an inner sectional lining 9, thus making it necessary to renew only the inner lining. It will thus be noted that the outer lining always remains in the furnace, it being necessary only to remove the inner lining (which is generally of cheap material), and making the expense of repairs and renewal very small.

The removable ring 24 seated onv top of the fire-brick or lining can be readily removed when necessary to reline the furnace, and the fire-brick or other material used for the lining 9 slipped in place.

The door fits snugly about the top of the furnace, and provided on its upper surface with a lever lug 25), by means of. which a lever may be inserted therein and open the door without exercising an undue amount of force. The beveled bottom 15, it will be noted, fits snugly about the bottom plate 10,

time the products of combustion passing through theop'ening 31 are collected therein and carried through the pipe 34 to the fine 45. This flue or pipe is preferably so arranged that running water is always in the bottom of the flue, by means of which what would otherwise be waste products of co1nbustion are condensed and saved. For instance, in the melting of brass,- the zinc oxids contained int-he fumes are readily condensed, forming zinc white, which may be recovered and used in the mechanic arts.

I claim: a

.1.' In afurnace, the combination with a casing, a'combustion chamber, a supplemental chamber surrounding said combustionchamber, twyeis intercommunicating between said. chambers, and means for introducing fluid tangentially within said supplemental chamber.

2. In a furnace, the combination with a casing, a combustion chamber, a supplemental chamber surronnding said combustion chamber, twyers intercommunicating between sa d chambers, means for introducing fluid within said supplemental chamber,

, lining of and means for removing any accumulated liquid from said supplemental chamber.

3. In a furnace, the combinatioirwith a casing, a combustion chamber, a supplemental chamber surrounding said combustion chamber, twyers intercommunicating between said chambers, means for introducing fluid within said supplemental chamber, and means for removing any accumulated liquid from said supplemental chamber and at the same time preventing the admission of air thereto or the escape of fluid therefrom through said means.

In a furnace, the combinationwith a casing, a combustion chamber, a sectional refractory material, a supplemental chamber surrounding said combustion chamber, twyers interconnnunicating between said chambers, means for introducing fluid within said supplemental chamber, and means for removing any accumulated liquid from said supplemental chamber and atthe same timepreventing the admission of air thereto or the escape of fluid therefrom through said means,

' 5. In a furnace, 'the combination with a casing, a combustion chamber, an outer lining, an inner sectional lining of refractory plemental chamber,

material, a supplemental chamber surrounding said combustion chamber, 'twyers intercon nn-unicating between said chambers, means for introducing fluid within said sup and means for removing any accumulatedliquid from said supplemental chamber and at the same time preventing the admission of air thereto or the escape of fluid therefrom through said means.

6. In a furnace, the combination with a casing, a combultion chamber, a hinged bottom therefor, an outer lining, an inner sectional lining of-refractorymaterial a supplemental chamber surrounding said combustion chamber, twyers intercominunicating between said chambers, means for introducing fluid Within said supplemental chamber, and means for removing any accunun lated liquid from said supplemental chamber andat the same time prevei ing the ad mission ofair thereto or the escape of fluid therefrom through said means.

7. In a furnace,' the combination with a casing, a combustion chamber, a h nged door or cover, ahmged bottom for said chamber, an outer lining, an inner sectional lining of refractory material, a su plemental chamber surrounding said combustion chamber, .twyers mtercommunicatmg .between said chambers, means for mtroducing fluid within said supplem atal chamber, and means for removing any accumulated liquid from said supplemental chamber and at the same time preventingthe admission of air thereto or the escape of fluid there from through said means.

8. In a furnace, the combination with a using, a combustion chamber, an outer lining, an inner sectional lining of refractory material, a covering plate, a removable ring within said plate seated upon the top of said lining, means for introducing air and steam within said chamber, and means for withdrawing the moisture from said air and steam. I

9. In a furnace, the combination with a casing, a combustion chamber, a cover, a hinged bottom provided with an opening in the apex thereof, means for introducing air and steam within said chamber, and mean'sfor withdrawing the moisture from said. air and steam, together with means for raising said cover comprising an apertured lug adapted to receive a lover therein.

10.111 a furnace, the combination with a casing, a combustion chamber, means for, introducing air and steam within said chamber, means for withdrawing the moisture from said air and steam, and a crucibleg adapted to rest on coals within said combustion chamber.

11. In a furnace, the combinationwith a casing, a combustion chamber, an outer lining, an inner sectional lining of refractory material, means for introducing air and steam within said chamber, means for withdrawing the moisture from said air and steam, and a crucible adapted to rest on coals within said combustion chamber.

12. In a furnace, the combination with a casing, a combustion chamber, an outer lining, an inner sectional lining of refractory material, a covering plate, a removable rin within said plate seated upon the top of sai lining, means for introducing air and steam within said chamber, means for withdrawing the moisture from said air and steam, and a crucible adapted to rest on coals within said combustion chamber.

13. In a furnace, the combination with a casing, a combustion chamber, a corona hinged bottom provided with an opening in the apex thereof, means for introducing air and steam within said chamber, and means for withdrawing the moisture from saidair and steam, together with means for raising said cover, comprising an apertured lug adapted to receive a lever there n, and a crucible adapted to rest on coals within said combustion chamber.

Signed by me at Chicago, Illinois, this '31st day of March 1908,

EDIT-"(RD (I, SCIIlVARTY.

Witnesses SARAH LEWIS, ALnEnrr J. Susan. 

